Note 6 - Interest Expense, Net - Components of Interest Expense (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Interest related to sale of tax benefits	$ 2,500	$ 3,155	$ 4,824	$ 6,816
Interest expense	19,634	18,821	36,800	36,383
Less — amount capitalized	(2,349)	(459)	(4,566)	(459)
Total interest expense, net	$ 19,785	$ 21,517	$ 37,058	$ 42,740